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Coccidiosis in cattle

Description

Coccidiosis is a common parasitic protozoan disease of cattle, particularly weaned calves, in Alberta. Bovine coccidiosis is seen most frequently in calves that are three weeks to six months of... More ≫

Description

Coccidiosis is a common parasitic protozoan disease of cattle, particularly weaned calves, in Alberta. Bovine coccidiosis is seen most frequently in calves that are three weeks to six months of age. Calves become infected when placed on pastures or lots contaminated by older cattle or other infected calves. Mature cattle may become infected when they are brought in from pastures and crowded into feedlots or barns. At least nine species of coccidia occur in Alberta cattle, but only two, Eimeria zuernii and Eimeria bovis, cause severe clinical disease. To a lesser extent, Eimeria alabamensis also can cause clinical disease. The prevalence of the different species of coccidia can vary considerably between farms, regions, seasons and age groups.

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Bladder-worm (beef measles) in cattle

Description

In cattle, the parasite Cysticercus bovis is commonly called bladder-worm or beef measles. This parasite is actually the larvae of the human tapeworm, Taenia saginata. The prevalence of... More ≫

Description

In cattle, the parasite Cysticercus bovis is commonly called bladder-worm or beef measles. This parasite is actually the larvae of the human tapeworm, Taenia saginata. The prevalence of cysticercosis in cattle in Canada is very low. When outbreaks occur, they are usually associated with a human carrier who has had close contact with cattle or cattle feed.

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Mange in cattle : demodectic mange

Description

Demodectic mange is caused by a microscopic mite, Demodex bovis, which lives in hair follicles and associated glands of cattle. Infestation with Demodex is common in cattle. Some 10 to 15 per cent... More ≫

Description

Demodectic mange is caused by a microscopic mite, Demodex bovis, which lives in hair follicles and associated glands of cattle. Infestation with Demodex is common in cattle. Some 10 to 15 per cent of the cattle in Alberta have Demodex, but most do not develop signs of mange.

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Sarcoptic mange in cattle

Description

Sarcoptic mange, or barn itch, is a disease caused by the parasitic mite, Sarcoptes scabiei. Mange produced by this mite can be severe because the mite burrows deeply into the skin, causing... More ≫

Description

Sarcoptic mange, or barn itch, is a disease caused by the parasitic mite, Sarcoptes scabiei. Mange produced by this mite can be severe because the mite burrows deeply into the skin, causing intense itching. Cattle affected by sarcoptic mange lose grazing time and do not gain weight as rapidly as do uninfected cattle.

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Intestinal roundworms of cattle

Description

Parasitic roundworms, or nematodes, are found year-round in cattle in Alberta. These parasites live in many sites including: lungs ; body cavity ; tear or lacrimal ducts ; beneath the skin ;... More ≫

Description

Parasitic roundworms, or nematodes, are found year-round in cattle in Alberta. These parasites live in many sites including: lungs ; body cavity ; tear or lacrimal ducts ; beneath the skin ; gastro-intestinal tract. Each area is occupied by roundworms specific to those sites. Cattle producers should be aware of the more important worms that can live in their cattle.

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Liver flukes in Alberta's livestock

Description

Two species of liver flukes have recently gained attention in Albertaís livestock and game farm industries. One species, the common liver fluke, Fasciola hepatica, has a wide range of herbivore... More ≫

Description

Two species of liver flukes have recently gained attention in Albertaís livestock and game farm industries. One species, the common liver fluke, Fasciola hepatica, has a wide range of herbivore hosts in which it can develop including cattle, bison, sheep, deer, swine and llama. In contrast, the giant liver fluke, Fascioloides magna, has a narrow host range. Wapiti (elk), white-tailed deer and caribou are the main hosts of this latter parasite in North America.

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Coccidiosis in chickens

Description

Coccidiosis causes considerable economic loss in the poultry industry. Chickens are susceptible to at least 11 species of coccidia. The most common species are Eimeria tenella, which causes the... More ≫

Description

Coccidiosis causes considerable economic loss in the poultry industry. Chickens are susceptible to at least 11 species of coccidia. The most common species are Eimeria tenella, which causes the cecal or bloody type of coccidiosis, E. necatrix, which causes bloody intestinal coccidiosis, and E. acervulina and E. maxima, which cause chronic intestinal coccidiosis.

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Trichomoniasis in birds

Description

The protozoan Trichomonas gallinae is a cosmopolitan parasite of pigeons and doves. Other birds such as domestic and wild turkeys, chickens, raptors (hawks, golden eagle, etc.) may also become... More ≫

Description

The protozoan Trichomonas gallinae is a cosmopolitan parasite of pigeons and doves. Other birds such as domestic and wild turkeys, chickens, raptors (hawks, golden eagle, etc.) may also become infected. The disease in pigeons is commonly called "canker". A similar condition in falcons is called "frounce."

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Chorioptic mange in cattle

Description

Chorioptic mange on cattle is caused by the parasitic mite, Chorioptes bovis. It is one of the most common mites on cattle in Alberta. These mites do not burrow deeply into the skin as do... More ≫

Description

Chorioptic mange on cattle is caused by the parasitic mite, Chorioptes bovis. It is one of the most common mites on cattle in Alberta. These mites do not burrow deeply into the skin as do Sarcoptes scabiei, the cause of sarcoptic mange. Unlike sarcoptic mange, chorioptic mange is not a federally reportable disease.

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